diff --git a/polkadot/.gitlab-ci.yml b/polkadot/.gitlab-ci.yml
index 1506137961..24d8ff0dbe 100644
--- a/polkadot/.gitlab-ci.yml
+++ b/polkadot/.gitlab-ci.yml
@@ -738,6 +738,36 @@ zombienet-tests-parachains-disputes:
   tags:
     - zombienet-polkadot-integration-test
 
+zombienet-tests-parachains-disputes-garbage-candidate:
+  stage:                           stage3
+  image:                           "${ZOMBIENET_IMAGE}"
+  <<:                              *kubernetes-env
+  <<:                              *zombienet-refs
+  needs:
+    - job:                         publish-polkadot-debug-image
+    - job:                         publish-test-collators-image
+    - job:                         publish-malus-image
+  variables:
+    GH_DIR:                        "https://github.com/paritytech/polkadot/tree/${CI_COMMIT_SHORT_SHA}/zombienet_tests/functional"
+  before_script:
+    - echo "Zombie-net Tests Config"
+    - echo "${ZOMBIENET_IMAGE_NAME}"
+    - echo "${PARACHAINS_IMAGE_NAME} ${PARACHAINS_IMAGE_TAG}"
+    - echo "${MALUS_IMAGE_NAME} ${MALUS_IMAGE_TAG}"
+    - echo "${GH_DIR}"
+    - export DEBUG=zombie,zombie::network-node
+    - export ZOMBIENET_INTEGRATION_TEST_IMAGE=${PARACHAINS_IMAGE_NAME}:${PARACHAINS_IMAGE_TAG}
+    - export MALUS_IMAGE=${MALUS_IMAGE_NAME}:${MALUS_IMAGE_TAG}
+    - export COL_IMAGE=${COLLATOR_IMAGE_NAME}:${COLLATOR_IMAGE_TAG}
+  script:
+    - /home/nonroot/zombie-net/scripts/ci/run-test-env-manager.sh
+        --github-remote-dir="${GH_DIR}"
+        --test="0003-parachains-garbage-candidate.feature"
+  allow_failure:                   false
+  retry: 2
+  tags:
+    - zombienet-polkadot-integration-test
+
 zombienet-test-parachains-upgrade-smoke-test:
   stage:                           stage3
   image:                           "${ZOMBIENET_IMAGE}"
diff --git a/polkadot/zombienet_tests/functional/0003-parachains-garbage-candidate.feature b/polkadot/zombienet_tests/functional/0003-parachains-garbage-candidate.feature
new file mode 100644
index 0000000000..24be749f13
--- /dev/null
+++ b/polkadot/zombienet_tests/functional/0003-parachains-garbage-candidate.feature
@@ -0,0 +1,41 @@
+Description: Test dispute finality lag when 1/3 of parachain validators always attempt to include an invalid block
+Network: ./0003-parachains-garbage-candidate.toml
+Creds: config
+
+honest-validator-0: is up
+honest-validator-1: is up
+honest-validator-2: is up
+malus-validator-0: is up
+
+# Check authority status.
+honest-validator-0: reports node_roles is 4
+honest-validator-1: reports node_roles is 4
+honest-validator-2: reports node_roles is 4
+malus-validator-0: reports node_roles is 4
+
+# Parachains should be making progress even if we have up to 1/3 malicious validators.
+honest-validator-0: parachain 2000 block height is at least 2 within 180 seconds
+honest-validator-1: parachain 2001 block height is at least 2 within 180 seconds
+honest-validator-2: parachain 2002 block height is at least 2 within 180 seconds
+
+# Check for chain reversion after dispute conclusion.
+honest-validator-0: log line contains "reverted due to a bad parachain block" within 180 seconds
+honest-validator-1: log line contains "reverted due to a bad parachain block" within 180 seconds
+honest-validator-2: log line contains "reverted due to a bad parachain block" within 180 seconds
+
+# Check if disputes are concluded in less than 2 blocks.
+honest-validator-0: reports polkadot_parachain_disputes_finality_lag is lower than 2
+honest-validator-1: reports polkadot_parachain_disputes_finality_lag is lower than 2
+honest-validator-2: reports polkadot_parachain_disputes_finality_lag is lower than 2
+
+# Allow more time for malicious validator activity.
+sleep 30 seconds
+
+# Check that garbage parachain blocks included by malicious validators are being disputed.
+honest-validator-0: reports parachain_candidate_disputes_total is at least 2 within 15 seconds
+honest-validator-1: reports parachain_candidate_disputes_total is at least 2 within 15 seconds
+honest-validator-2: reports parachain_candidate_disputes_total is at least 2 within 15 seconds
+
+# Disputes should always end as "invalid"
+honest-validator-0: reports parachain_candidate_dispute_concluded{validity="invalid"} is at least 2 within 15 seconds
+honest-validator-1: reports parachain_candidate_dispute_concluded{validity="valid"} is 0 within 15 seconds
diff --git a/polkadot/zombienet_tests/functional/0003-parachains-garbage-candidate.toml b/polkadot/zombienet_tests/functional/0003-parachains-garbage-candidate.toml
new file mode 100644
index 0000000000..8f82d30e2a
--- /dev/null
+++ b/polkadot/zombienet_tests/functional/0003-parachains-garbage-candidate.toml
@@ -0,0 +1,46 @@
+[settings]
+timeout = 1000
+bootnode = true
+
+[relaychain.genesis.runtime.runtime_genesis_config.configuration.config]
+  max_validators_per_core = 1
+  needed_approvals = 2
+
+[relaychain]
+default_image = "{{ZOMBIENET_INTEGRATION_TEST_IMAGE}}"
+chain = "rococo-local"
+chain_spec_command = "polkadot build-spec --chain rococo-local --disable-default-bootnode"
+default_command = "polkadot"
+
+[relaychain.default_resources]
+limits = { memory = "4G", cpu = "2" }
+requests = { memory = "2G", cpu = "1" }
+
+  [[relaychain.node_groups]]
+  name = "honest-validator"
+  count = 3
+  args = ["-lparachain=debug,runtime=debug"]
+
+  [[relaychain.node_groups]]
+  image = "{{MALUS_IMAGE}}"
+  name = "malus-validator"
+  command = "malus suggest-garbage-candidate"
+  args = ["-lparachain=debug,MALUS=trace"]
+  count = 1
+ 
+{% for id in range(2000,2003) %}
+[[parachains]]
+id = {{id}}
+addToGenesis = true
+genesis_state_generator = "undying-collator export-genesis-state --pov-size={{10000*(id-1999)}} --pvf-complexity={{id - 1999}}"
+    [parachains.collator]
+    image = "{{COL_IMAGE}}"
+    name = "collator"
+    command = "undying-collator"
+    args = ["-lparachain=debug", "--pov-size={{10000*(id-1999)}}", "--parachain-id={{id}}", "--pvf-complexity={{id - 1999}}"]
+{% endfor %}
+
+[types.Header]
+number = "u64"
+parent_hash = "Hash"
+post_state = "Hash"